Added migration which removes all presynaptic terminal, postsynaptic terminal and synpases
Added migration which removes all presynaptic terminal, postsynaptic terminal and synpases

Be careful when refreshing the start page. Depending on the project size,
it may take several minutes to complete this migration.

htem/CATMAID,fzadow/CATMAID,htem/CATMAID,htem/CATMAID,htem/CATMAID,fzadow/CATMAID,fzadow/CATMAID,fzadow/CATMAID